To find the density of a penny, you would measure its mass using a scale, then measure its volume by water displacement or using a caliper to measure its dimensions. Divide the mass by the volume to calculate the density of the penny.
penny
Kilograms are a measure of mass, not of weight.
mass of a substance or an object
weigh the penny on a scale to the nearest gram
You would use the unit of measure called "kilograms" to measure the mass of an elephant.
No, millilitres is a measure of volume not mass. You would use milligrams.
The most common thing you would measure mass in would be grams and kilograms
Milligram: to measure its mass.
You Use Atomic Mass Number
The density of a substance is the ratio of its mass to its volume. So, I would measure the mass and volume of a substance to calculate density.
You would use a scale to measure the mass of a block. Place the block on the scale and record the reading to determine its mass.